heavy cream • eggs • juce of 1 lemon • hot sause • garlic powder • onion powder • choped herbs, like parshley, chives or dill • Butter, for greasing baking dish • sweet potatoes, peeled and sliced 1/8-inch thick • onion, thinly sliced, 1/8-inch thick • parmesan cheese, plus additional for sprinkling • cheddar cheese •
